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NIOSH

(2,4,5-TRICHLOROPHENOXY) ACETIC ACID

ICSC: 0075

2,4,5-T
C8H5Cl3O3 / C6H2Cl3OCH2COOH
Molecular mass: 255.5
ICSC # 0075 		CAS # 93-76-5
RTECS # AJ8400000
UN # 3345
EC # 607-041-00-9
April 21, 2005 Validated

TYPES OF HAZARD/ EXPOSURE

ACUTE HAZARDS/ SYMPTOMS

PREVENTION

FIRST AID/
FIRE FIGHTING

FIRE Combustible under specific conditions. Liquid formulations containing organic solvents may be flammable. Gives off irritating or toxic fumes (or gases) in a fire.
NO open flames.
Water spray, powder.
EXPLOSION


EXPOSURE See NOTES.
PREVENT DISPERSION OF DUST! AVOID EXPOSURE OF (PREGNANT) WOMEN!

•INHALATION Cough. Sore throat.
Local exhaust or breathing protection.
Fresh air, rest.
•SKIN
Protective gloves.
Remove contaminated clothes. Rinse and then wash skin with water and soap.
•EYES Redness. Pain.
Safety goggles.
First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
•INGESTION Diarrhoea. Drowsiness. Headache. Nausea. Vomiting.
Do not eat, drink, or smoke during work. Wash hands before eating.
Rinse mouth. Give a slurry of activated charcoal in water to drink. Refer for medical attention.

SPILLAGE DISPOSAL

STORAGE

PACKAGING & LABELLING

Personal protection: P2 filter respirator for harmful particles. Sweep spilled substance into covered containers; if appropriate, moisten first to prevent dusting. Carefully collect remainder, then remove to safe place. Do NOT let this chemical enter the environment.
Provision to contain effluent from fire extinguishing. Separated from food and feedstuffs. Store in an area without drain or sewer access.
Do not transport with food and feedstuffs.
Xn symbol
N symbol
R: 22-36/37/38-50/53
S: 2-24-60-61
UN Hazard Class: 6.1
UN Packing Group: III
ICSC: 0075 Prepared in the context of cooperation between the International Programme on Chemical Safety & the Commission of the European Communities (C) IPCS CEC 1994. No modifications to the International version have been made except to add the OSHA PELs, NIOSH RELs and NIOSH IDLH values.

(2,4,5-TRICHLOROPHENOXY) ACETIC ACID

ICSC: 0075

I

M

P

O

R

T

A

N

T


D

A

T

A

PHYSICAL STATE; APPEARANCE:
WHITE CRYSTALLINE POWDER

PHYSICAL DANGERS:


CHEMICAL DANGERS:
The substance decomposes on heating and on burning producing toxic and corrosive gasesincludingphosgene (see ICSC0007)andhydrogen chloride (see ICSC0163). The solution in water is a weak acid.

OCCUPATIONAL EXPOSURE LIMITS:
TLV: 10 mg/m3 as TWA; A4 (not classifiable as a human carcinogen); (ACGIH 2005).
MAK: (Inhalable fraction) 10 mg/m3;
Peak limitation category: II(2);
skin absorption (H);
Pregnancy risk group: C;
(DFG 2004).
OSHA PEL: TWA 10 mg/m3
NIOSH REL: TWA 10 mg/m3
NIOSH IDLH: 250 mg/m3 See: 93765


ROUTES OF EXPOSURE:
The substance can be absorbed into the body by inhalation of its aerosol and by ingestion.

INHALATION RISK:
A harmful concentration of airborne particles can be reached quickly on spraying or when dispersed, especially if powdered.

EFFECTS OF SHORT-TERM EXPOSURE:
The substance is irritating to the eyes and the respiratory tract .

EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:
Animal tests show that this substance possibly causes toxicity to human reproduction or development. See Notes.

PHYSICAL
PROPERTIES

Decomposes below boiling point
Melting point: 153-158°C
Density: 1.80
g/cm3
Solubility in water, g/100 ml at 25°C: 0.03
Vapour pressure, Pa at 25°C: negligible
Octanol/water partition coefficient as log Pow: 4

ENVIRONMENTAL
DATA

The substance is very toxic to aquatic organisms. This substance does enter the environment under normal use. Great care, however, should be given to avoid any additional release, e.g. through inappropriate disposal.

N O T E S

Temperature of decomposition unknown in literature. Commercial products may contain toxic dioxin (see ICSC 1467 2,3,7,8-TCDD). If the substance is formulated with solvent(s) also consult the card(s) (ICSC) of the solvent(s). Carrier solvents used in commercial formulations may change physical and toxicological properties. The recommendations on this card also apply to salts of 2,4,5-Trichlorophenoxyacetic acid. Esterone 245, Trioxone and Weedone are trade names.
Transport Emergency Card: TEC (R)-61GT7-III

ADDITIONAL INFORMATION



ICSC: 0075 (2,4,5-TRICHLOROPHENOXY) ACETIC ACID
(C) IPCS, CEC, 1994
IMPORTANT LEGAL NOTICE: Neither NIOSH, the CEC or the IPCS nor any person acting on behalf of NIOSH, the CEC or the IPCS is responsible for the use which might be made of this information. This card contains the collective views of the IPCS Peer Review Committee and may not reflect in all cases all the detailed requirements included in national legislation on the subject. The user should verify compliance of the cards with the relevant legislation in the country of use. The only modifications made to produce the U.S. version is inclusion of the OSHA PELs, NIOSH RELs and NIOSH IDLH values.
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